One, the gate of the articulated screw loosening, articulated threads for positive and negative screw, up and down between two bearing with double screw, if the screw loose, will cause fluctuation are inaccurate. With a 80 mm long Ф 4 rods inserted between double-headed screw turn to adjust the brake lever up and down in place. Second, the floodgates of loose coil embedded wire: local sense coil cannot be firmly fixed in the nest, cars passing the vibrations will cause the nest winding deformation, change to sense the initial inductance, the sensor must be reset again rear can normal work. The solution is to melt the bitumen poured inside the fixed. Three, gate turn arm screw loose: if the screw loose, will cause the brake lever gate lever and inaccurate and stop shaking is larger, the bolt hang tight, tighten up the nut. Four, power-off protection switch power: power gate control part failure, gate automatic protection device will work automatically, the brake lever stops in the inclined position on the motionless, disconnect the main supply, the machine doesn't work. Open the door of the machine, the big belt 3 - clockwise 8 the circle to the superior can be recovered. If so many times can't recover, it needs to check whether hall element and circuit board failure. Suzhou book door maintenance! Five, in place to control the magnet Noah: up and down in place all use CiMin hall element, if the rectangular magnet and reducer wafer with CAM position change, caused by inaccurate in place. Adjust its accurate, cannot turn, can solve the problem. Six, under the retractor adjusting nut loose: the lower chassis is equipped with threaded M10 retractor, its function is pull balancing mechanism of spring and balance function of zero adjustment. And is equipped with two M10 hexagonal nut and Ф 10 spring washer, if the nut is loose, machine tapping and balance disorder happens, although machine can work after balance disorders, but will greatly increase speed reducer, motor and other drive load, thus influence the gate operation reliability and mechanical life.